A critical look at electric field emission of electrons from metallic surfaces

2008 ◽  
Vol 104 (6) ◽  
pp. 064909 ◽  
Author(s):  
Mahendra Singh Sodha ◽  
Amrit Dixit
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Metallic Surfaces ◽  
Field Emission Of Electrons

Nanotube Carbon Structure Tips - A Source of High Field Emission of Electrons

1994 ◽  
Vol 359 ◽  
Author(s):  
Leonid A. Chernozatonskii ◽  
Yu.V. Gulyaev ◽  
Z.Ja. Kosakoyskaja ◽  
N.I. Sinitsyn ◽  
G.V. Torgashov ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Quartz Glass ◽  
High Field ◽  
Emission Current ◽  
Carbon Structure ◽  
Glass Density ◽  
And Inversion ◽  
Field Emission Of Electrons

ABSTRACTWe present the finding of experiments of considerable field emission from the films consisting of nanotube carbon structureson various substrates (Si, quartz, glass): density of emission current was up to 1-3 A/cm2 while electric field was about 100 V/μ. The “reconstruction” and “inversion” of field emission have also been observed after current breakdown.

Field emission of electrons from cylindrical metallic surfaces

2008 ◽  
Vol 104 (8) ◽  
pp. 084908 ◽  
Author(s):  
Mahendra Singh Sodha ◽  
Amrit Dixit
Keyword(s):  
Field Emission ◽  
Metallic Surfaces ◽  
Field Emission Of Electrons

Electric field emission of electrons from negatively charged spherical particles in a dusty plasma in the regime of nonlinear screening

2010 ◽  
Vol 88 (8) ◽  
pp. 617-621 ◽  
Author(s):  
Gyan Prakash
Keyword(s):  
Potential Energy ◽  
Electric Field ◽  
Dusty Plasma ◽  
Field Emission ◽  
Energy Barrier ◽  
Tunneling Probability ◽  
Spherical Particles ◽  
Potential Energy Barrier ◽  
The Matrix ◽  
Field Emission Of Electrons

This note presents a discussion of the electric field emission from negatively charged spherical particles in a dusty plasma in the regime of nonlinear screening. Using the appropriate representation of the nonlinear screening by Gurevich and the matrix method, the tunneling probability of an electron through the potential energy barrier around the particle has been evaluated as a function of its radial energy; corresponding values of the current density have also been obtained. A discussion of numerical results, thus obtained concludes the presentation.

Modeling and Calculation of Electron Transmission Coefficient from Printed CNT Film to Vacuum

2012 ◽  
Vol 586 ◽  
pp. 145-150
Author(s):  
You Lin Zhang ◽  
Wan Quan Yang ◽  
Hua Li Ma ◽  
Fan Guang Zeng
Keyword(s):  
Electric Field ◽  
Transmission Coefficient ◽  
Field Emission ◽  
Quantum Mechanical ◽  
Vacuum Level ◽  
Potential Barriers ◽  
Electron Transmission ◽  
Total Transmission ◽  
Tunneling Conduction ◽  
Field Emission Of Electrons

The conducting chains in printed CNT film were considered as (MI)iV or (MI)i-1MV configuration. The transport and field emission of electrons in printed CNT film can be considered as tunneling conduction. The transmission coefficient of an insulator barrier surrounding a CNT was calculated via quantum mechanical principle. When an electric field is applied to CNTs, the barrier of residual was considered as a group of rectangular potential barriers. The total transmission coefficient for a residual-covered emitter during emitting was solved numerically from the product of the two transmission coefficient for the potential barriers of residual and the vacuum level.

Effect of electric field emission on charging of dust particles in a plasma

2009 ◽  
Vol 76 (2) ◽  
pp. 159-168 ◽  
Author(s):  
MAHENDRA SINGH SODHA ◽  
AMRIT DIXIT ◽  
GYAN PRAKASH
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Spherical Particles ◽  
Dust Particles ◽  
Density Of Electrons ◽  
Field Emission Of Electrons

AbstractThe authors have considered the charging of spherical particles in a plasma, taking into account the electric field emission of electrons from the dust particles and the change in the electron/ion densities in the plasma. The dependence of the charge of a particle and electron/ion densities on the radius and number of dust particles and the density of electrons/ions and the temperature in the undisturbed plasma has been studied numerically without and with the inclusion of the electric field emission of electrons from the particles. It is seen that both the electric field emission and the electron/ion kinetics significantly affect the charging process.

scholarly journals Optically Induced Field-Emission Source Based on Aligned Vertical Carbon Nanotube Arrays

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1810
Author(s):  
Mengjie Li ◽  
Qilong Wang ◽  
Ji Xu ◽  
Jian Zhang ◽  
Zhiyang Qi ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electric Field ◽  
Field Emission ◽  
Field Enhancement ◽  
Absorption Efficiency ◽  
Photon Absorption ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
Induced Field ◽  
Optically Induced

Due to the high field enhancement factor and photon-absorption efficiency, carbon nanotubes (CNTs) have been widely used in optically induced field-emission as a cathode. Here, we report vertical carbon nanotube arrays (VCNTAs) that performed as high-density electron sources. A combination of high applied electric field and laser illumination made it possible to modulate the emission with laser pulses. When the bias electric field and laser power density increased, the emission process is sensitive to a power law of the laser intensity, which supports the emission mechanism of optically induced field emission followed by over-the-barrier emission. Furthermore, we determine a polarization dependence that exhibits a cosine behavior, which verifies the high possibility of optically induced field emission.

scholarly journals Polarization of electric-field noise near metallic surfaces

2015 ◽  
Vol 92 (1) ◽  
Author(s):  
Philipp Schindler ◽  
Dylan J Gorman ◽  
Nikos Daniilidis ◽  
Hartmut Häffner
Keyword(s):  
Electric Field ◽  
Metallic Surfaces ◽  
Field Noise

scholarly journals Effect of heating and resistance on emission properties of carbon nanotubes

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Sergey V. Bulyarskiy 1 ◽  
Alexander A. Dudin 1 ◽  
Alexander V. Lakalin 1 ◽  
Andrey P. Orlov 1 ◽  
Alexander A. Pavlov 1 ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Thermionic Emission ◽  
Negative Resistance ◽  
Cvd Method ◽  
Field Emission Current ◽  
Multi Walled Carbon Nanotube ◽  
Voltage Current Characteristic ◽  
Field Emission Of Electrons ◽  
A Current

We have studied the effect of the series resistance on the heating of the cathode, which is based on carbon nanotubes and serves to realize the field emission of electrons into the vacuum. The experiment was performed with the single multi-walled carbon nanotube (MCNT) that was separated from the array grown by CVD method with thin-film Ni-Ti catalyst (nickel 4 nm / Ti 10 nm). The heating of the cathode leads to the appearance of a current of the thermionic emission. The experimental voltage current characteristic exhibited the negative resistance region caused by thermal field emission. This current increases strongly with increasing voltage and contributes to the degradation of the cold emitter. The calculation of the temperature of the end of the cathode is made taking into account the effect of the phenomenon that warms up and cools the cathode. We have developed a method for processing of the emission volt-ampere characteristics of a cathode, which relies on a numerical calculation of the field emission current and the comparison of these calculations with experiments. The model of the volt-ampere characteristic takes into account the CNT’s geometry, properties, its contact with the catalyst; heating and simultaneous implementation of the thermionic and field emission. The calculation made it possible to determine a number of important parameters, among which the voltage and current of the beginning of thermionic emission, the temperature distribution along the cathode, the resistance of the nanotube. The phenomenon of thermionic emission from CNT’s was investigated experimentally and theoretically. The conditions of this type emission occurrence were defined. The results of the study could form the basis of theory of CNT emitter’s degradation.

scholarly journals Electric field assisted growth and field emission properties of thermally oxidized CuO nanowires

RSC Advances ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 6439-6446 ◽  
Author(s):  
Chunmei Tang ◽  
Xinyue Liao ◽  
Weijie Zhong ◽  
Hongya Yu ◽  
Zhongwu Liu
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Field Intensity ◽  
Electric Field Intensity ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Cuo Nanowires

The growth and field emission properties of thermally oxidized CuO nanowires are influenced by the electric field intensity and direction.

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